-               /** Programmer ID string, returned to the host during the CMD_SIGN_ON command processing */
-               #define PROGRAMMER_ID              "AVRISP_MK2"
-               
-               /** Timeout period for each issued command from the host before it is aborted */
-               #define COMMAND_TIMEOUT_MS         200
-               
-               /** Command timeout counter register, GPIOR for speed */
-               #define TimeoutMSRemaining         GPIOR0
-
-               /** MUX mask for the VTARGET ADC channel number */
-               #define VTARGET_ADC_CHANNEL_MASK   _GETADCMUXMASK(ADC_CHANNEL, VTARGET_ADC_CHANNEL)
-               
-               #if !defined(WIN_AVRDUDE_COMPAT)
-                       #define SELECT_DATA_OUT_ENDPOINT() Endpoint_SetEndpointDirection(ENDPOINT_DIR_OUT);
+               #if defined(VTARGET_USE_INTERNAL_REF)
+                       #undef  VTARGET_REF_VOLTS
+                       #define VTARGET_REF_VOLTS 2.56
+
+                       #define VTARGET_REF_MASK ADC_REFERENCE_INT2560MV